Theodore scheffleb



T. SCHEPPLER.

- METAL DRILLING TOOL.

No. 314,059. r v Patented Mar. 17, 1,885.

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THEODORE SCHEFFLER, OF PATERSON, NE\V JERSEY.

METAL-DRILLING TOOL.

SPECIFICATION forming part of Letters Patent No. 314,059, dated March 17, 1885. 1 Application filed February 7, 1884. X0 model.)

. To all whom it may concern:

Be it known that I, THEODORE SOHEFFLER, a citizen of the United States, residing at Paterson, in the county of Passaic and State of New Jersey, have invented a new and useful Improvement in Ratchets, of which the following is a specification.

My invention relates to the tool usually called in niachineshop parlance ratchet. It is for the purpose of drilling holes by hand, a handle receiving a reciprocating motion imparting the motionto the drill in one direction, and in the opposite one no motion is communicated. In my improved ratchet this operation is produced by means of friction. The parts are of much simpler construction than in the ratchets usually applied.

In the accompanying drawings similar letters refer to similar parts.

The particular matters of construction and of combinations which constitute my improvement are hereinafter set forth, and will be specifically defined in the claims.

Figure 1 is a top View with handle removed. Fig. 2 is a section through lineV V, with handle attached. Fig. 3 is a bottom view of the handle only; Fig. 4, a; transverse section through handle in direction of the line X X, Fig. 3, showing half-rings and lever-bar.

Fig. 5 is a transverse section through line XX,

rings and lever-bar removed; Fig. 6, asection through handle in direction of line Y Y.

The different parts of the ratchet consist of a cylindrical-shaped main body, a handle, two plain half-rings, a small lever-bar, and the feed-screw.

The cylindrical-shaped main body A A, Figs. 1 and 2, contains on one end the drillsocket D. At the other end a central hub extends to A, and receives the feedscrew; or it may be made long enough to form the feedscrew itself. Between the hub and the outside diameter of the main body an annular recess is turned to receive the two plain half-rings B G and- B G, which meet atG and C; but at B and B a suitable space is left to admit asmall four-sided prismatic-alshaped lever-bar, E, of steel, which is in such a position that the longitudinal axis is parallel with the axis of the main body. One end of said bar enters, as stated, the space between the half-rings and the other end extends upward into a recess, I,

cast in the, handle F H, Figs. 8, 5, 6. The handle at F, Figs. 2, 3, conforms to the cylindrical shape of the main body. It is of the same outside diameter, and contains the cylindrical hole L, Figs. 3, 6, which fits on the central hub of the main body loosely to allow the han die to rotate easily. The above-n1entioned recess I in the handle has one side, (I, Fig. 5, running parallel with the axis of the main body, and touches the lever-bar the whole distance as far as the latter enters the recess. other side, 9, Fl g. 5, is inclined for the purpose of leaving a space, a, Fig. 4, between the lever-bar and the side e. At the top at a, Fig. 4, the recess fits the bar.

Having now described the principal parts of my invention, I will explain the operation of the same.

\Vhen the handleH is moved in the three tion of the arrow, Figs. 3, 4, a pressure is produced on the lever bar E, and acts, owing to the clearance c, at the highest point of the bar at a, and E becomes a lever, transferring the strain, by means of leverage at the points b and I), on the ends of the half-rings at B and B, respectively, forcing them apart and producing friction on the outside of their circumference and the circumference of the recess of the main body, therefore communicating motion to the main body and so to the drill. By moving the handle in the opposite direction there exists no leverage, because the bar E leans with one-half of its length against the side d of the recess in the handle. The bar is in that direction immovable. It is, as it were, tight in the handle. produced on the rings forcing them apart. They will simply be carried along with the bar and handle, revolving loosely in the annular recess.

It may be more convenient to cast the recess I in the handle with both the sidesd and e inclined; but then it is necessary'to shape the 1ever-bar on one side so as to bear against one inclined side.

The above combination is really the application of afriction-clutch where friction-rings are applied; and I am aware that I mentioned in my application for patent of frictionclut-ch, which patent was issued January 15, 1884, that it may be applied in place of a ratchet; but- I do not employ in my new combination No strain will be- The 4 ICO a lever fulcrumed to one side of the expanding ring. The parts are simpler of construction. In that patent, also, the pressure expanding the split ring is not applied at points in a plane parallel to the axis, as in my present device, but at right angles to theaxis.

WVhat I claim, and desire to secure by Letters Patent, is

1. The combination, with the two revolving parts of the device, of a split expanding ring carried by and bearing upon one of the parts and a lever-bar located in the split of the ring parallel with the axis of rotation and engaging with the other part of the device at its outer end to expand the ring and lock the parts together in their rotary movement, substantial] y as set forth.

2. The combinatiomwith one revolving part of the device, a split expanding ring carried by and bearing upon such part, and a leverbar located in the split of the ring parallel with the axis of rotation, of the other revolving part of the device, provided with a recess receiving said lever-bar and bearing in one direction upon the end of said lever-bar to expand the ring and lock the parts together, and in the other direction to move the lever-bar bodily without expanding the ring, substan tially as set forth.

3. The combination, in a ratchet drillingtool,of the stock, the handle-head, and handle, with a sectional expanding ring lying in an annular spacein the stock, and alever-pinlocated in the split of the sectional ring lying parallel with the axis of rotation, and engaging at one end with an angular recess in the stock to expand the ring and thus lock the parts together in their rotary movement, substantially as set forth.

TH EODORE SOHEFFLER.

\Vitnesses:

FREDK. A. SCHEFFLER, Louis KIrstNGER. 

